# 去除字符串两头的空格
phone = " 13554964684134  ".strip()
print(phone)
# print(phone.strip())

# 大小写转换
# 转大写：字符串.upper()
 # 转小写：字符串.lower()
 # 定义SQL语句变量
sql = "SelECt * from students where id = 001;"
if "SELECT" in sql.upper():
	print("显示查询结果")
else:
	print("非查询")